function changeIt(objName)
{
    //The image object accessed through its id we mentioned in the DIV block which is going to be visible currently
    var obj = document.getElementById(objName);

    //An array that hold the IDs of images that we mentioned in their DIV blocks
    var objId = new Array();

    //Storing the image IDs into the array starts here
    objId[0] = "image1";
    objId[1] = "image2";
    objId[2] = "image3";
    objId[3] = "image4";
    objId[4] = "image5";
    //Storing the image IDs into the array ends here

    //A counter variable going to use for iteration
    var i;

    //A variable that can hold all the other object references other than the object which is going to be visible
    var tempObj;

    //The following loop does the display of a single image based on its ID. The image whose ID we passed into this function will be the
    //only image that is displayed rest of the images will be hidden based on their IDs and that part has been handled by the else part
    //of the if statement within this loop.
    for(i=0;i<objId.length;i++)
    {
        if(objName == objId[i])
        {
            obj.style.display = "block";
        }
        else
        {
            tempObj = document.getElementById(objId[i]);
            tempObj.style.display = "none";
        }
    }
    return;
}